Ventilating device



Patented Jan. 7, 1941 UNITED STATES PATENT OFFICE 9 Claims.

This invention relates to a ventilating device, and particularly to onethat is placed outside of a building and communicates with the inside tothereby accelerate the outflow of air.

The principal object of my invention is to provide a ventilator thatwill increase the volume of air discharged through ventilators of thesame size heretofore used. Another object is to provide a simplifiedconstruction for my device,

bly economical and convenient, and its operation efiicient.

The foregoing and other objects which will appear as the nature of theinvention is better understood, may be accomplished by a construction,combination and operative arrangement of parts such as is disclosed bythe drawing and specification. The nature of the invention is such as torender it susceptible to various changes and modifications, and,therefore, I am not to be limited to said disclosure; but am entitled toall such changes therefrom as fall within the scope of my claims.

In the drawing:

Figure 1 is a longitudinal, sectional view of my ventilating device, asit appears in operation.

Figure 2 is a bottom view in perspective, illustrating the air exhaustblades and portion of the interior of the rotor hood.

As illustrated, I provide a flue pipe or stack |2 which is adapted tocommunicate with the room to be ventilated, and through which air passesfrom within the building outwardly. Supporting arms I4 are fastened asat |5 to said flue pipe and extend inwardly to support a housing l6which encloses bearings, later referred to. An opening IT in saidhousing |6 receives a shaft 29, later described. Said arms M arefastened as at 29 to lugs l9 which are integral with said 0 housing I6.There is a ball 22 at the bottom of said housing on which said shaft 29rotates and a bearing 23 near the top of said housing. For conveniencein lubricating said ball 22 and bearing 23 I preferably provide an oilpipe 25 which enters said housing I6 through an opening therein andcommunicates with said bearing 23. This oil pipe 25 extends through anopening in said flue pipe I2, slanting downwardly towards said housing.

My device has a rotor hood 28 which covers and overhangs the top of saidflue pipe l2, and extends outside of and below the top of said flue pipea short distance, as illustrated in Figure 1 of the drawing. Said rotorhood 28 rotates on a shaft 29 fixed thereto, which extends into saidthereby making its manufacture and its assem-- housing I6 and rests onsaid ball 22. Within the interior of said rotor hood 28 a conical platedeflector formation is provided consisting of a lower portion 30, whichtapers at a relatively acute angle to said shaft 29, and an upperportion 3| which tapers more abruptly outward relative to said shaft, asillustrated in Figure 1 of the drawing, The angle of said lower portion30 should be less than 45 degrees relative to said shaft and preferably30 degrees, while the angle of said upper portion 3| should be more than45 degrees relative to said shaft, and preferably degrees. For bestresults there should be a difference of at least 20 degrees andpreferably 30 degrees in the angles of said lower and upper portions 30and 3|, the lower portion 30 being the nearer to vertical and the upperportion 3| being the nearer to horizontal.

This conical plate deflector formation substantially increases thecapacity of my device to discharge air, as the angle of said lowerportion 30 is such as to provide unusually large cubic capacity in saidflue pipe for the upward passage of air at a very vital point, namely,where the air exhausting blades 32 commence, the operation of whichaccelerates the discharge of the rising air outwardly. The said upperportion 3| extends at a substantially greater than 45 degree angle tosaid shaft 29 because at this part of my ventilator the rising air mustchange its direction to be discharged outwardly, as indicated by thearrows in Figure 1 of the drawing. This upper portion 3| commences at apoint slightly higher than the top edge of said flue pipe l2, so thatthe point where the air can turn to pass outwardly is at about the pointwhere said upper portion 3| begins, or preferably, as shown, slightlybelow said point.

Said interior blades 32 are suction inducing, and inasmuch as the angleof said lower portion 30 provides unusually large capacity in said fluepipeIZ at this point, the said blades 32 can also be correspondinglylarger, thereby increasing their capacity to discharge air. These blades32 have flanges 33 formed at their inner edges which are fastened as at34 to said lower and upper portions 30 and 3| of the conical platedeflector formation, said blades 32 and flanges 33 following the anglesof said two portions 30 and 3|, as shown in the drawing. Said blades 32preferably extend outwardly from the outer surfaces of said deflectorportions 30 and 3| in a diagonal direction to the vertical axis of saidshaft 29, said rotor hood 28 rotating in a clockwise direction, with theresult that said blades scoop the air upwardly and outwardly.

Said rotor hood 28 has an outside main top or hood portion 36 of conicalshape, from which a skirt or side 31 extends downwardly, flaringoutwardly somewhat to increase the passage for the discharge of airoutwardly. The said main top portion slants at an angle of more thandegrees to said vertical shaft 29 and preferably at about 65 degrees,while said rotor hood side 3'! slants outwardly at less than 45 degreesto said shaft 29, and preferably about 30 degrees.

On the outside of and fastened to said rotor hood 28 are vanes 38 of thepocket type, the top edge 39 of which extends upwardly and outwardlytowards the outer end, the object being to increase the area of saidvanes at their. most efli,

cient points, namely at their outer ends. Said vanes 38 extend fromalmost the apex of said rotor hood 28 to a point slightly above thebottom edge of said side 31. Said shaft 29 is fixed in a socket 4| whichis fastened to said rotor hood main top portion 36 by bolts 42.

What I claim is:

1. A ventilating device comprising a flue pipe in combination with arotor hood having a hood portion and a shaft, said flue pipe havingmeans to receive and rotatably support said shaft in a position wherebysaid rotor hood is spaced from said flue pipe, said rotor hood having aconical plate deflector formation embodying an upper and a lowerportion, the upper portion extending outwardly at a greater anglerelative to said shaft than the said lower portion, the top edge of saidflue pipe being directly opposite and spaced laterally from said lowerportion thereby providing a'passage therebetween, the lower edge of saidrotor hood extending below and being spaced laterally from said fluepipe top edge thereby providing a passage therebetween.

2. A ventilating device comprising a flue in combination with a rotorhood having a hood portion and a shaft, said flue pipe having means toreceive and rotatably support said shaft in a position whereby saidrotor hood is spaced from said flue pipe, said rotor hood having aconical plate deflector formation embodying an upper and a lower portionand air exhausting blades attached thereto, the upper portion extendingabruptly from and outwardly at a great er angle relative to said shaftthan any part of the said lower portion, the top edge of said flue pipebeing directly opposite and spaced laterally from said lower portionthereby providing a passage therebetween.

3. A ventilating device comprising a flue pipe in combination with arotor hood having a hood portion and a shaft, said flue pipe havingmeans to receive and rotatably support said shaft in a position wherebysaid rotor hood is spaced from said flue pipe, said rotor hood having aconical plate deflector formation embodying an upper and a lowerportion, the upper portion extending outwardly at a greater anglerelative to said shaft than the said lower portion, the top edge of saidflue pipe being directly opposite and spaced laterally from said lowerportion thereby providing a passage therebetween, said rotor hood havingair exhausting blades attached to and supported by said upper and lowerportions, the upper extremities of said blades terminating at a pointhigher than said flue pipe top edge and spaced below the top extremityof said upper portion.

4. A ventilating device comprising a flue pipe in combination with arotor hood having a hood portion and a shaft, said flue pipe havingmeans to receive and rotatably support said shaft in a position wherebysaid rotor hood is spaced from said flue pipe, said rotor hood having aninterior conical plate deflector formation embodying an upper and alower portion, the upper portion extending at a greater angle relativeto said shaft than said lower portion, said rotor hood having anexterior conical portion extending from the center of said rotor hooddownwardly and a side portion extending from said exterior portiondownwardly and outwardly, said side portion commencing at a pointopposite and laterally spaced from said upper portion and extending to apoint opposite said lower portion and below and laterally spaced fromthe top edge of said flue pipe.

5. A ventilating device comprising a flue pipe in combination with arotor hood having a hood portion and a shaft, said flue pipe havingmeans to receive and rotatably support said shaft in a position wherebysaid rotor hood is spaced from said flue pipe, said rotor hood having aninterior conical plate deflector formation embodying an upper and alower portion, the upper portion extending at a greater angle than 45degrees relative to said shaft and said lower portion extending at anangle less than 45 degrees relative to said shaft, said rotor hoodhaving an exterior conical portion extending downwardly and outwardly atan angle greater than 45 degrees relative to said shaft, and a sideportion extending from said exterior portion downwardly and outwardly atan angle less than 45 degrees relative to said shaft, said side portioncommencing at a point opposite and laterally spaced from said upperportion and extending to a point opposite said lower portion.

6. A ventilating device comprising a flue pipe in combination with arotor hood having a hood portion and a shaft afflxed to said rotor hood,said flue pipe having means in the interior thereof adaptedto receiveand rotatably support said shaft in a position whereby said rotor hoodis spaced from said flue pipe, said hood portion extending over saidflue pipe and below and laterally spaced from the top edge of said fluepipe, said rotor hood having an exterior conical portion extendingdownwardly and outwardly to a point above and laterally spaced from saidflue pipe top edge, and having an exterior side portion extendingfrornsaid exterior conical portion downwardly and terminating at a pointlaterally spaced from and below the top edge of said flue pipe, saidrotor hood having an interior conical plate deflector formationembodying an upper and a lower portion, the upper portion extending at agreater angle relativeto said shaft than said lower portion, and airexhausting blades fastened to and supported by said upper andlowerdeflector portions and extending laterally therefrom and spaced from theshaft in a position whereby said rotor hood is spaced from said fluepipe, said hood portion extending over said flue pipe and .below andlaterally spaced from the top edge of said flue pipe, said rotor hoodhaving an exterior conical portion extending from an apex formed at thecenter of said rotor downwardly at an angle greater than 45 degreesrelative to said shaft to a point above and laterally spaced from saidflue pipe top edge, and having an exterior side portion extending fromsaid exterior conical portion downwardly and outwardly at an angle lessthan 45 degrees relative to said shaft and terminating at a. pointlaterally spaced from and below the top edge o f said flue pipe, saidrotor hood having an interior conical plate deflector formationembodying an upper and a lower portion, the upper portion extendingupwardly at a greater angle relative to said shaft than said lowerportion there being a difference of substantially 30 degrees betweensaid angles of said two portions and air exhausting blades fastened toand supported by said upper and lower deflector portions and extendinglaterally therefrom and spaced laterally from the outside edge of saidflue pipe, said flue pipe top edge being laterally opposite saiddeflector lower portion and said rotor hood side portion terminating atits lower extremity at a point laterally opposite said deflector lowerportion and terminating at its upper extremity at a point opposite saiddeflector upper portion.

8. A ventilating device comprising a flue pipe in combination with arotor hood having a shaft a-fiixed thereto, said rotor hood having aninterior conical plate deflector formation extending upwardly andoutwardly, and having an exterior conical hood portion extendingdownwardly and outwardly and a side portion extending from said conicalhood portion downwardly, said rotor hood having air exhausting bladesfastened to and supported by said deflector formation, said bladesextending into said flue pipe and extending above higher than said fluepipe, said deflector formation extending upwardly to a point above andas far laterally as the top edge of said flue pipe extends.

9. A ventilating device comprising a flue pipe in combination with arotor hood comprising a shaft and air exhausting blades having portionslaterally opposite said flue pipe, and a conical plate deflectorformation secured to said shaft, with a lower portion extending in astraight line at an acute angle to said shaft and an upper portionextending in a straight line at an angle more abruptly outward from saidshaft, said blades being fastened to and supported by said upper andlower portions, the outer edges of said blades being spaced laterallyfrom and extending parallel with the portions of said flue pipelaterally opposite them.

ALEXANDER SMITH.

v CERTIFICATE OF CORRECTION. Patent No. 2,227,852. January 7, 1911.1.

ALEXANDER SMITH.

It is hereby certified that error appears in the printed specificationof the above numbered patent. requiring correctionfzs follows: Page 2,first coluinn, line 14.1, claim 2, after the word "flue" insert pipe.--;and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the caee in thePatent Office.

Signed and sealed this 25th day of March, A. D. 19in;

Henry Van Arsdale, (Seal) Acting Commissioner of Patents

